1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2019, Linaro Limited 3 4 #include <linux/clk.h> 5 #include <linux/completion.h> 6 #include <linux/interrupt.h> 7 #include <linux/io.h> 8 #include <linux/kernel.h> 9 #include <linux/module.h> 10 #include <linux/debugfs.h> 11 #include <linux/of.h> 12 #include <linux/of_irq.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/regmap.h> 15 #include <linux/reset.h> 16 #include <linux/slab.h> 17 #include <linux/pm_wakeirq.h> 18 #include <linux/slimbus.h> 19 #include <linux/soundwire/sdw.h> 20 #include <linux/soundwire/sdw_registers.h> 21 #include <sound/pcm_params.h> 22 #include <sound/soc.h> 23 #include "bus.h" 24 25 #define SWRM_COMP_SW_RESET 0x008 26 #define SWRM_COMP_STATUS 0x014 27 #define SWRM_LINK_MANAGER_EE 0x018 28 #define SWRM_EE_CPU 1 29 #define SWRM_FRM_GEN_ENABLED BIT(0) 30 #define SWRM_VERSION_1_3_0 0x01030000 31 #define SWRM_VERSION_1_5_1 0x01050001 32 #define SWRM_VERSION_1_7_0 0x01070000 33 #define SWRM_VERSION_2_0_0 0x02000000 34 #define SWRM_COMP_HW_VERSION 0x00 35 #define SWRM_COMP_CFG_ADDR 0x04 36 #define SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK BIT(1) 37 #define SWRM_COMP_CFG_ENABLE_MSK BIT(0) 38 #define SWRM_COMP_PARAMS 0x100 39 #define SWRM_COMP_PARAMS_WR_FIFO_DEPTH GENMASK(14, 10) 40 #define SWRM_COMP_PARAMS_RD_FIFO_DEPTH GENMASK(19, 15) 41 #define SWRM_COMP_PARAMS_DOUT_PORTS_MASK GENMASK(4, 0) 42 #define SWRM_COMP_PARAMS_DIN_PORTS_MASK GENMASK(9, 5) 43 #define SWRM_COMP_MASTER_ID 0x104 44 #define SWRM_V1_3_INTERRUPT_STATUS 0x200 45 #define SWRM_V2_0_INTERRUPT_STATUS 0x5000 46 #define SWRM_INTERRUPT_STATUS_RMSK GENMASK(16, 0) 47 #define SWRM_INTERRUPT_STATUS_SLAVE_PEND_IRQ BIT(0) 48 #define SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED BIT(1) 49 #define SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS BIT(2) 50 #define SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET BIT(3) 51 #define SWRM_INTERRUPT_STATUS_RD_FIFO_OVERFLOW BIT(4) 52 #define SWRM_INTERRUPT_STATUS_RD_FIFO_UNDERFLOW BIT(5) 53 #define SWRM_INTERRUPT_STATUS_WR_CMD_FIFO_OVERFLOW BIT(6) 54 #define SWRM_INTERRUPT_STATUS_CMD_ERROR BIT(7) 55 #define SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION BIT(8) 56 #define SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH BIT(9) 57 #define SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED BIT(10) 58 #define SWRM_INTERRUPT_STATUS_AUTO_ENUM_FAILED BIT(11) 59 #define SWRM_INTERRUPT_STATUS_AUTO_ENUM_TABLE_IS_FULL BIT(12) 60 #define SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED_V2 BIT(13) 61 #define SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED_V2 BIT(14) 62 #define SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP BIT(16) 63 #define SWRM_INTERRUPT_STATUS_CMD_IGNORED_AND_EXEC_CONTINUED BIT(19) 64 #define SWRM_INTERRUPT_MAX 17 65 #define SWRM_V1_3_INTERRUPT_MASK_ADDR 0x204 66 #define SWRM_V1_3_INTERRUPT_CLEAR 0x208 67 #define SWRM_V2_0_INTERRUPT_CLEAR 0x5008 68 #define SWRM_V1_3_INTERRUPT_CPU_EN 0x210 69 #define SWRM_V2_0_INTERRUPT_CPU_EN 0x5004 70 #define SWRM_V1_3_CMD_FIFO_WR_CMD 0x300 71 #define SWRM_V2_0_CMD_FIFO_WR_CMD 0x5020 72 #define SWRM_V1_3_CMD_FIFO_RD_CMD 0x304 73 #define SWRM_V2_0_CMD_FIFO_RD_CMD 0x5024 74 #define SWRM_CMD_FIFO_CMD 0x308 75 #define SWRM_CMD_FIFO_FLUSH 0x1 76 #define SWRM_V1_3_CMD_FIFO_STATUS 0x30C 77 #define SWRM_V2_0_CMD_FIFO_STATUS 0x5050 78 #define SWRM_RD_CMD_FIFO_CNT_MASK GENMASK(20, 16) 79 #define SWRM_WR_CMD_FIFO_CNT_MASK GENMASK(12, 8) 80 #define SWRM_CMD_FIFO_CFG_ADDR 0x314 81 #define SWRM_CONTINUE_EXEC_ON_CMD_IGNORE BIT(31) 82 #define SWRM_RD_WR_CMD_RETRIES 0x7 83 #define SWRM_V1_3_CMD_FIFO_RD_FIFO_ADDR 0x318 84 #define SWRM_V2_0_CMD_FIFO_RD_FIFO_ADDR 0x5040 85 #define SWRM_RD_FIFO_CMD_ID_MASK GENMASK(11, 8) 86 #define SWRM_ENUMERATOR_CFG_ADDR 0x500 87 #define SWRM_ENUMERATOR_SLAVE_DEV_ID_1(m) (0x530 + 0x8 * (m)) 88 #define SWRM_ENUMERATOR_SLAVE_DEV_ID_2(m) (0x534 + 0x8 * (m)) 89 #define SWRM_MCP_FRAME_CTRL_BANK_ADDR(m) (0x101C + 0x40 * (m)) 90 #define SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK GENMASK(2, 0) 91 #define SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK GENMASK(7, 3) 92 #define SWRM_MCP_BUS_CTRL 0x1044 93 #define SWRM_MCP_BUS_CLK_START BIT(1) 94 #define SWRM_MCP_CFG_ADDR 0x1048 95 #define SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK GENMASK(21, 17) 96 #define SWRM_DEF_CMD_NO_PINGS 0x1f 97 #define SWRM_MCP_STATUS 0x104C 98 #define SWRM_MCP_STATUS_BANK_NUM_MASK BIT(0) 99 #define SWRM_MCP_SLV_STATUS 0x1090 100 #define SWRM_MCP_SLV_STATUS_MASK GENMASK(1, 0) 101 #define SWRM_MCP_SLV_STATUS_SZ 2 102 #define SWRM_DP_PORT_CTRL_BANK(n, m) (0x1124 + 0x100 * (n - 1) + 0x40 * m) 103 #define SWRM_DP_PORT_CTRL_2_BANK(n, m) (0x1128 + 0x100 * (n - 1) + 0x40 * m) 104 #define SWRM_DP_BLOCK_CTRL_1(n) (0x112C + 0x100 * (n - 1)) 105 #define SWRM_DP_BLOCK_CTRL2_BANK(n, m) (0x1130 + 0x100 * (n - 1) + 0x40 * m) 106 #define SWRM_DP_PORT_HCTRL_BANK(n, m) (0x1134 + 0x100 * (n - 1) + 0x40 * m) 107 #define SWRM_DP_BLOCK_CTRL3_BANK(n, m) (0x1138 + 0x100 * (n - 1) + 0x40 * m) 108 #define SWRM_DP_SAMPLECTRL2_BANK(n, m) (0x113C + 0x100 * (n - 1) + 0x40 * m) 109 #define SWRM_DIN_DPn_PCM_PORT_CTRL(n) (0x1054 + 0x100 * (n - 1)) 110 #define SWR_V1_3_MSTR_MAX_REG_ADDR 0x1740 111 #define SWR_V2_0_MSTR_MAX_REG_ADDR 0x50ac 112 113 #define SWRM_V2_0_CLK_CTRL 0x5060 114 #define SWRM_V2_0_CLK_CTRL_CLK_START BIT(0) 115 #define SWRM_V2_0_LINK_STATUS 0x5064 116 117 #define SWRM_DP_PORT_CTRL_EN_CHAN_SHFT 0x18 118 #define SWRM_DP_PORT_CTRL_OFFSET2_SHFT 0x10 119 #define SWRM_DP_PORT_CTRL_OFFSET1_SHFT 0x08 120 #define SWRM_AHB_BRIDGE_WR_DATA_0 0xc85 121 #define SWRM_AHB_BRIDGE_WR_ADDR_0 0xc89 122 #define SWRM_AHB_BRIDGE_RD_ADDR_0 0xc8d 123 #define SWRM_AHB_BRIDGE_RD_DATA_0 0xc91 124 125 #define SWRM_REG_VAL_PACK(data, dev, id, reg) \ 126 ((reg) | ((id) << 16) | ((dev) << 20) | ((data) << 24)) 127 128 #define MAX_FREQ_NUM 1 129 #define TIMEOUT_MS 100 130 #define QCOM_SWRM_MAX_RD_LEN 0x1 131 #define QCOM_SDW_MAX_PORTS 14 132 #define DEFAULT_CLK_FREQ 9600000 133 #define SWRM_MAX_DAIS 0xF 134 #define SWR_INVALID_PARAM 0xFF 135 #define SWR_HSTOP_MAX_VAL 0xF 136 #define SWR_HSTART_MIN_VAL 0x0 137 #define SWR_BROADCAST_CMD_ID 0x0F 138 #define SWR_MAX_CMD_ID 14 139 #define MAX_FIFO_RD_RETRY 3 140 #define SWR_OVERFLOW_RETRY_COUNT 30 141 #define SWRM_LINK_STATUS_RETRY_CNT 100 142 143 enum { 144 MASTER_ID_WSA = 1, 145 MASTER_ID_RX, 146 MASTER_ID_TX 147 }; 148 149 struct qcom_swrm_port_config { 150 u16 si; 151 u8 off1; 152 u8 off2; 153 u8 bp_mode; 154 u8 hstart; 155 u8 hstop; 156 u8 word_length; 157 u8 blk_group_count; 158 u8 lane_control; 159 }; 160 161 /* 162 * Internal IDs for different register layouts. Only few registers differ per 163 * each variant, so the list of IDs below does not include all of registers. 164 */ 165 enum { 166 SWRM_REG_FRAME_GEN_ENABLED, 167 SWRM_REG_INTERRUPT_STATUS, 168 SWRM_REG_INTERRUPT_MASK_ADDR, 169 SWRM_REG_INTERRUPT_CLEAR, 170 SWRM_REG_INTERRUPT_CPU_EN, 171 SWRM_REG_CMD_FIFO_WR_CMD, 172 SWRM_REG_CMD_FIFO_RD_CMD, 173 SWRM_REG_CMD_FIFO_STATUS, 174 SWRM_REG_CMD_FIFO_RD_FIFO_ADDR, 175 }; 176 177 struct qcom_swrm_ctrl { 178 struct sdw_bus bus; 179 struct device *dev; 180 struct regmap *regmap; 181 u32 max_reg; 182 const unsigned int *reg_layout; 183 void __iomem *mmio; 184 struct reset_control *audio_cgcr; 185 #ifdef CONFIG_DEBUG_FS 186 struct dentry *debugfs; 187 #endif 188 struct completion broadcast; 189 struct completion enumeration; 190 /* Port alloc/free lock */ 191 struct mutex port_lock; 192 struct clk *hclk; 193 int irq; 194 unsigned int version; 195 int wake_irq; 196 int num_din_ports; 197 int num_dout_ports; 198 int cols_index; 199 int rows_index; 200 unsigned long port_mask; 201 u32 intr_mask; 202 u8 rcmd_id; 203 u8 wcmd_id; 204 /* Port numbers are 1 - 14 */ 205 struct qcom_swrm_port_config pconfig[QCOM_SDW_MAX_PORTS + 1]; 206 struct sdw_stream_runtime *sruntime[SWRM_MAX_DAIS]; 207 enum sdw_slave_status status[SDW_MAX_DEVICES + 1]; 208 int (*reg_read)(struct qcom_swrm_ctrl *ctrl, int reg, u32 *val); 209 int (*reg_write)(struct qcom_swrm_ctrl *ctrl, int reg, int val); 210 u32 slave_status; 211 u32 wr_fifo_depth; 212 u32 rd_fifo_depth; 213 bool clock_stop_not_supported; 214 }; 215 216 struct qcom_swrm_data { 217 u32 default_cols; 218 u32 default_rows; 219 bool sw_clk_gate_required; 220 u32 max_reg; 221 const unsigned int *reg_layout; 222 }; 223 224 static const unsigned int swrm_v1_3_reg_layout[] = { 225 [SWRM_REG_FRAME_GEN_ENABLED] = SWRM_COMP_STATUS, 226 [SWRM_REG_INTERRUPT_STATUS] = SWRM_V1_3_INTERRUPT_STATUS, 227 [SWRM_REG_INTERRUPT_MASK_ADDR] = SWRM_V1_3_INTERRUPT_MASK_ADDR, 228 [SWRM_REG_INTERRUPT_CLEAR] = SWRM_V1_3_INTERRUPT_CLEAR, 229 [SWRM_REG_INTERRUPT_CPU_EN] = SWRM_V1_3_INTERRUPT_CPU_EN, 230 [SWRM_REG_CMD_FIFO_WR_CMD] = SWRM_V1_3_CMD_FIFO_WR_CMD, 231 [SWRM_REG_CMD_FIFO_RD_CMD] = SWRM_V1_3_CMD_FIFO_RD_CMD, 232 [SWRM_REG_CMD_FIFO_STATUS] = SWRM_V1_3_CMD_FIFO_STATUS, 233 [SWRM_REG_CMD_FIFO_RD_FIFO_ADDR] = SWRM_V1_3_CMD_FIFO_RD_FIFO_ADDR, 234 }; 235 236 static const struct qcom_swrm_data swrm_v1_3_data = { 237 .default_rows = 48, 238 .default_cols = 16, 239 .max_reg = SWR_V1_3_MSTR_MAX_REG_ADDR, 240 .reg_layout = swrm_v1_3_reg_layout, 241 }; 242 243 static const struct qcom_swrm_data swrm_v1_5_data = { 244 .default_rows = 50, 245 .default_cols = 16, 246 .max_reg = SWR_V1_3_MSTR_MAX_REG_ADDR, 247 .reg_layout = swrm_v1_3_reg_layout, 248 }; 249 250 static const struct qcom_swrm_data swrm_v1_6_data = { 251 .default_rows = 50, 252 .default_cols = 16, 253 .sw_clk_gate_required = true, 254 .max_reg = SWR_V1_3_MSTR_MAX_REG_ADDR, 255 .reg_layout = swrm_v1_3_reg_layout, 256 }; 257 258 static const unsigned int swrm_v2_0_reg_layout[] = { 259 [SWRM_REG_FRAME_GEN_ENABLED] = SWRM_V2_0_LINK_STATUS, 260 [SWRM_REG_INTERRUPT_STATUS] = SWRM_V2_0_INTERRUPT_STATUS, 261 [SWRM_REG_INTERRUPT_MASK_ADDR] = 0, /* Not present */ 262 [SWRM_REG_INTERRUPT_CLEAR] = SWRM_V2_0_INTERRUPT_CLEAR, 263 [SWRM_REG_INTERRUPT_CPU_EN] = SWRM_V2_0_INTERRUPT_CPU_EN, 264 [SWRM_REG_CMD_FIFO_WR_CMD] = SWRM_V2_0_CMD_FIFO_WR_CMD, 265 [SWRM_REG_CMD_FIFO_RD_CMD] = SWRM_V2_0_CMD_FIFO_RD_CMD, 266 [SWRM_REG_CMD_FIFO_STATUS] = SWRM_V2_0_CMD_FIFO_STATUS, 267 [SWRM_REG_CMD_FIFO_RD_FIFO_ADDR] = SWRM_V2_0_CMD_FIFO_RD_FIFO_ADDR, 268 }; 269 270 static const struct qcom_swrm_data swrm_v2_0_data = { 271 .default_rows = 50, 272 .default_cols = 16, 273 .sw_clk_gate_required = true, 274 .max_reg = SWR_V2_0_MSTR_MAX_REG_ADDR, 275 .reg_layout = swrm_v2_0_reg_layout, 276 }; 277 278 #define to_qcom_sdw(b) container_of(b, struct qcom_swrm_ctrl, bus) 279 280 static int qcom_swrm_ahb_reg_read(struct qcom_swrm_ctrl *ctrl, int reg, 281 u32 *val) 282 { 283 struct regmap *wcd_regmap = ctrl->regmap; 284 int ret; 285 286 /* pg register + offset */ 287 ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_RD_ADDR_0, 288 (u8 *)®, 4); 289 if (ret < 0) 290 return SDW_CMD_FAIL; 291 292 ret = regmap_bulk_read(wcd_regmap, SWRM_AHB_BRIDGE_RD_DATA_0, 293 val, 4); 294 if (ret < 0) 295 return SDW_CMD_FAIL; 296 297 return SDW_CMD_OK; 298 } 299 300 static int qcom_swrm_ahb_reg_write(struct qcom_swrm_ctrl *ctrl, 301 int reg, int val) 302 { 303 struct regmap *wcd_regmap = ctrl->regmap; 304 int ret; 305 /* pg register + offset */ 306 ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_WR_DATA_0, 307 (u8 *)&val, 4); 308 if (ret) 309 return SDW_CMD_FAIL; 310 311 /* write address register */ 312 ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_WR_ADDR_0, 313 (u8 *)®, 4); 314 if (ret) 315 return SDW_CMD_FAIL; 316 317 return SDW_CMD_OK; 318 } 319 320 static int qcom_swrm_cpu_reg_read(struct qcom_swrm_ctrl *ctrl, int reg, 321 u32 *val) 322 { 323 *val = readl(ctrl->mmio + reg); 324 return SDW_CMD_OK; 325 } 326 327 static int qcom_swrm_cpu_reg_write(struct qcom_swrm_ctrl *ctrl, int reg, 328 int val) 329 { 330 writel(val, ctrl->mmio + reg); 331 return SDW_CMD_OK; 332 } 333 334 static u32 swrm_get_packed_reg_val(u8 *cmd_id, u8 cmd_data, 335 u8 dev_addr, u16 reg_addr) 336 { 337 u32 val; 338 u8 id = *cmd_id; 339 340 if (id != SWR_BROADCAST_CMD_ID) { 341 if (id < SWR_MAX_CMD_ID) 342 id += 1; 343 else 344 id = 0; 345 *cmd_id = id; 346 } 347 val = SWRM_REG_VAL_PACK(cmd_data, dev_addr, id, reg_addr); 348 349 return val; 350 } 351 352 static int swrm_wait_for_rd_fifo_avail(struct qcom_swrm_ctrl *ctrl) 353 { 354 u32 fifo_outstanding_data, value; 355 int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT; 356 357 do { 358 /* Check for fifo underflow during read */ 359 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS], 360 &value); 361 fifo_outstanding_data = FIELD_GET(SWRM_RD_CMD_FIFO_CNT_MASK, value); 362 363 /* Check if read data is available in read fifo */ 364 if (fifo_outstanding_data > 0) 365 return 0; 366 367 usleep_range(500, 510); 368 } while (fifo_retry_count--); 369 370 if (fifo_outstanding_data == 0) { 371 dev_err_ratelimited(ctrl->dev, "%s err read underflow\n", __func__); 372 return -EIO; 373 } 374 375 return 0; 376 } 377 378 static int swrm_wait_for_wr_fifo_avail(struct qcom_swrm_ctrl *ctrl) 379 { 380 u32 fifo_outstanding_cmds, value; 381 int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT; 382 383 do { 384 /* Check for fifo overflow during write */ 385 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS], 386 &value); 387 fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value); 388 389 /* Check for space in write fifo before writing */ 390 if (fifo_outstanding_cmds < ctrl->wr_fifo_depth) 391 return 0; 392 393 usleep_range(500, 510); 394 } while (fifo_retry_count--); 395 396 if (fifo_outstanding_cmds == ctrl->wr_fifo_depth) { 397 dev_err_ratelimited(ctrl->dev, "%s err write overflow\n", __func__); 398 return -EIO; 399 } 400 401 return 0; 402 } 403 404 static bool swrm_wait_for_wr_fifo_done(struct qcom_swrm_ctrl *ctrl) 405 { 406 u32 fifo_outstanding_cmds, value; 407 int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT; 408 409 /* Check for fifo overflow during write */ 410 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS], &value); 411 fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value); 412 413 if (fifo_outstanding_cmds) { 414 while (fifo_retry_count) { 415 usleep_range(500, 510); 416 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS], &value); 417 fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value); 418 fifo_retry_count--; 419 if (fifo_outstanding_cmds == 0) 420 return true; 421 } 422 } else { 423 return true; 424 } 425 426 427 return false; 428 } 429 430 static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *ctrl, u8 cmd_data, 431 u8 dev_addr, u16 reg_addr) 432 { 433 434 u32 val; 435 int ret = 0; 436 u8 cmd_id = 0x0; 437 438 if (dev_addr == SDW_BROADCAST_DEV_NUM) { 439 cmd_id = SWR_BROADCAST_CMD_ID; 440 val = swrm_get_packed_reg_val(&cmd_id, cmd_data, 441 dev_addr, reg_addr); 442 } else { 443 val = swrm_get_packed_reg_val(&ctrl->wcmd_id, cmd_data, 444 dev_addr, reg_addr); 445 } 446 447 if (swrm_wait_for_wr_fifo_avail(ctrl)) 448 return SDW_CMD_FAIL_OTHER; 449 450 if (cmd_id == SWR_BROADCAST_CMD_ID) 451 reinit_completion(&ctrl->broadcast); 452 453 /* Its assumed that write is okay as we do not get any status back */ 454 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_WR_CMD], val); 455 456 if (ctrl->version <= SWRM_VERSION_1_3_0) 457 usleep_range(150, 155); 458 459 if (cmd_id == SWR_BROADCAST_CMD_ID) { 460 swrm_wait_for_wr_fifo_done(ctrl); 461 /* 462 * sleep for 10ms for MSM soundwire variant to allow broadcast 463 * command to complete. 464 */ 465 ret = wait_for_completion_timeout(&ctrl->broadcast, 466 msecs_to_jiffies(TIMEOUT_MS)); 467 if (!ret) 468 ret = SDW_CMD_IGNORED; 469 else 470 ret = SDW_CMD_OK; 471 472 } else { 473 ret = SDW_CMD_OK; 474 } 475 return ret; 476 } 477 478 static int qcom_swrm_cmd_fifo_rd_cmd(struct qcom_swrm_ctrl *ctrl, 479 u8 dev_addr, u16 reg_addr, 480 u32 len, u8 *rval) 481 { 482 u32 cmd_data, cmd_id, val, retry_attempt = 0; 483 484 val = swrm_get_packed_reg_val(&ctrl->rcmd_id, len, dev_addr, reg_addr); 485 486 /* 487 * Check for outstanding cmd wrt. write fifo depth to avoid 488 * overflow as read will also increase write fifo cnt. 489 */ 490 swrm_wait_for_wr_fifo_avail(ctrl); 491 492 /* wait for FIFO RD to complete to avoid overflow */ 493 usleep_range(100, 105); 494 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_RD_CMD], val); 495 /* wait for FIFO RD CMD complete to avoid overflow */ 496 usleep_range(250, 255); 497 498 if (swrm_wait_for_rd_fifo_avail(ctrl)) 499 return SDW_CMD_FAIL_OTHER; 500 501 do { 502 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_RD_FIFO_ADDR], 503 &cmd_data); 504 rval[0] = cmd_data & 0xFF; 505 cmd_id = FIELD_GET(SWRM_RD_FIFO_CMD_ID_MASK, cmd_data); 506 507 if (cmd_id != ctrl->rcmd_id) { 508 if (retry_attempt < (MAX_FIFO_RD_RETRY - 1)) { 509 /* wait 500 us before retry on fifo read failure */ 510 usleep_range(500, 505); 511 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 512 SWRM_CMD_FIFO_FLUSH); 513 ctrl->reg_write(ctrl, 514 ctrl->reg_layout[SWRM_REG_CMD_FIFO_RD_CMD], 515 val); 516 } 517 retry_attempt++; 518 } else { 519 return SDW_CMD_OK; 520 } 521 522 } while (retry_attempt < MAX_FIFO_RD_RETRY); 523 524 dev_err(ctrl->dev, "failed to read fifo: reg: 0x%x, rcmd_id: 0x%x,\ 525 dev_num: 0x%x, cmd_data: 0x%x\n", 526 reg_addr, ctrl->rcmd_id, dev_addr, cmd_data); 527 528 return SDW_CMD_IGNORED; 529 } 530 531 static int qcom_swrm_get_alert_slave_dev_num(struct qcom_swrm_ctrl *ctrl) 532 { 533 u32 val, status; 534 int dev_num; 535 536 ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val); 537 538 for (dev_num = 1; dev_num <= SDW_MAX_DEVICES; dev_num++) { 539 status = (val >> (dev_num * SWRM_MCP_SLV_STATUS_SZ)); 540 541 if ((status & SWRM_MCP_SLV_STATUS_MASK) == SDW_SLAVE_ALERT) { 542 ctrl->status[dev_num] = status & SWRM_MCP_SLV_STATUS_MASK; 543 return dev_num; 544 } 545 } 546 547 return -EINVAL; 548 } 549 550 static void qcom_swrm_get_device_status(struct qcom_swrm_ctrl *ctrl) 551 { 552 u32 val; 553 int i; 554 555 ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val); 556 ctrl->slave_status = val; 557 558 for (i = 1; i <= SDW_MAX_DEVICES; i++) { 559 u32 s; 560 561 s = (val >> (i * 2)); 562 s &= SWRM_MCP_SLV_STATUS_MASK; 563 ctrl->status[i] = s; 564 } 565 } 566 567 static void qcom_swrm_set_slave_dev_num(struct sdw_bus *bus, 568 struct sdw_slave *slave, int devnum) 569 { 570 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 571 u32 status; 572 573 ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &status); 574 status = (status >> (devnum * SWRM_MCP_SLV_STATUS_SZ)); 575 status &= SWRM_MCP_SLV_STATUS_MASK; 576 577 if (status == SDW_SLAVE_ATTACHED) { 578 if (slave) 579 slave->dev_num = devnum; 580 mutex_lock(&bus->bus_lock); 581 set_bit(devnum, bus->assigned); 582 mutex_unlock(&bus->bus_lock); 583 } 584 } 585 586 static int qcom_swrm_enumerate(struct sdw_bus *bus) 587 { 588 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 589 struct sdw_slave *slave, *_s; 590 struct sdw_slave_id id; 591 u32 val1, val2; 592 bool found; 593 u64 addr; 594 int i; 595 char *buf1 = (char *)&val1, *buf2 = (char *)&val2; 596 597 for (i = 1; i <= SDW_MAX_DEVICES; i++) { 598 /* do not continue if the status is Not Present */ 599 if (!ctrl->status[i]) 600 continue; 601 602 /*SCP_Devid5 - Devid 4*/ 603 ctrl->reg_read(ctrl, SWRM_ENUMERATOR_SLAVE_DEV_ID_1(i), &val1); 604 605 /*SCP_Devid3 - DevId 2 Devid 1 Devid 0*/ 606 ctrl->reg_read(ctrl, SWRM_ENUMERATOR_SLAVE_DEV_ID_2(i), &val2); 607 608 if (!val1 && !val2) 609 break; 610 611 addr = buf2[1] | (buf2[0] << 8) | (buf1[3] << 16) | 612 ((u64)buf1[2] << 24) | ((u64)buf1[1] << 32) | 613 ((u64)buf1[0] << 40); 614 615 sdw_extract_slave_id(bus, addr, &id); 616 found = false; 617 ctrl->clock_stop_not_supported = false; 618 /* Now compare with entries */ 619 list_for_each_entry_safe(slave, _s, &bus->slaves, node) { 620 if (sdw_compare_devid(slave, id) == 0) { 621 qcom_swrm_set_slave_dev_num(bus, slave, i); 622 if (slave->prop.clk_stop_mode1) 623 ctrl->clock_stop_not_supported = true; 624 625 found = true; 626 break; 627 } 628 } 629 630 if (!found) { 631 qcom_swrm_set_slave_dev_num(bus, NULL, i); 632 sdw_slave_add(bus, &id, NULL); 633 } 634 } 635 636 complete(&ctrl->enumeration); 637 return 0; 638 } 639 640 static irqreturn_t qcom_swrm_wake_irq_handler(int irq, void *dev_id) 641 { 642 struct qcom_swrm_ctrl *ctrl = dev_id; 643 int ret; 644 645 ret = pm_runtime_get_sync(ctrl->dev); 646 if (ret < 0 && ret != -EACCES) { 647 dev_err_ratelimited(ctrl->dev, 648 "pm_runtime_get_sync failed in %s, ret %d\n", 649 __func__, ret); 650 pm_runtime_put_noidle(ctrl->dev); 651 return ret; 652 } 653 654 if (ctrl->wake_irq > 0) { 655 if (!irqd_irq_disabled(irq_get_irq_data(ctrl->wake_irq))) 656 disable_irq_nosync(ctrl->wake_irq); 657 } 658 659 pm_runtime_mark_last_busy(ctrl->dev); 660 pm_runtime_put_autosuspend(ctrl->dev); 661 662 return IRQ_HANDLED; 663 } 664 665 static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id) 666 { 667 struct qcom_swrm_ctrl *ctrl = dev_id; 668 u32 value, intr_sts, intr_sts_masked, slave_status; 669 u32 i; 670 int devnum; 671 int ret = IRQ_HANDLED; 672 clk_prepare_enable(ctrl->hclk); 673 674 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_STATUS], 675 &intr_sts); 676 intr_sts_masked = intr_sts & ctrl->intr_mask; 677 678 do { 679 for (i = 0; i < SWRM_INTERRUPT_MAX; i++) { 680 value = intr_sts_masked & BIT(i); 681 if (!value) 682 continue; 683 684 switch (value) { 685 case SWRM_INTERRUPT_STATUS_SLAVE_PEND_IRQ: 686 devnum = qcom_swrm_get_alert_slave_dev_num(ctrl); 687 if (devnum < 0) { 688 dev_err_ratelimited(ctrl->dev, 689 "no slave alert found.spurious interrupt\n"); 690 } else { 691 sdw_handle_slave_status(&ctrl->bus, ctrl->status); 692 } 693 694 break; 695 case SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED: 696 case SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS: 697 dev_dbg_ratelimited(ctrl->dev, "SWR new slave attached\n"); 698 ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &slave_status); 699 if (ctrl->slave_status == slave_status) { 700 dev_dbg(ctrl->dev, "Slave status not changed %x\n", 701 slave_status); 702 } else { 703 qcom_swrm_get_device_status(ctrl); 704 qcom_swrm_enumerate(&ctrl->bus); 705 sdw_handle_slave_status(&ctrl->bus, ctrl->status); 706 } 707 break; 708 case SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET: 709 dev_err_ratelimited(ctrl->dev, 710 "%s: SWR bus clsh detected\n", 711 __func__); 712 ctrl->intr_mask &= ~SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET; 713 ctrl->reg_write(ctrl, 714 ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN], 715 ctrl->intr_mask); 716 break; 717 case SWRM_INTERRUPT_STATUS_RD_FIFO_OVERFLOW: 718 ctrl->reg_read(ctrl, 719 ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS], 720 &value); 721 dev_err_ratelimited(ctrl->dev, 722 "%s: SWR read FIFO overflow fifo status 0x%x\n", 723 __func__, value); 724 break; 725 case SWRM_INTERRUPT_STATUS_RD_FIFO_UNDERFLOW: 726 ctrl->reg_read(ctrl, 727 ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS], 728 &value); 729 dev_err_ratelimited(ctrl->dev, 730 "%s: SWR read FIFO underflow fifo status 0x%x\n", 731 __func__, value); 732 break; 733 case SWRM_INTERRUPT_STATUS_WR_CMD_FIFO_OVERFLOW: 734 ctrl->reg_read(ctrl, 735 ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS], 736 &value); 737 dev_err(ctrl->dev, 738 "%s: SWR write FIFO overflow fifo status %x\n", 739 __func__, value); 740 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1); 741 break; 742 case SWRM_INTERRUPT_STATUS_CMD_ERROR: 743 ctrl->reg_read(ctrl, 744 ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS], 745 &value); 746 dev_err_ratelimited(ctrl->dev, 747 "%s: SWR CMD error, fifo status 0x%x, flushing fifo\n", 748 __func__, value); 749 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1); 750 break; 751 case SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION: 752 dev_err_ratelimited(ctrl->dev, 753 "%s: SWR Port collision detected\n", 754 __func__); 755 ctrl->intr_mask &= ~SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION; 756 ctrl->reg_write(ctrl, 757 ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN], 758 ctrl->intr_mask); 759 break; 760 case SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH: 761 dev_err_ratelimited(ctrl->dev, 762 "%s: SWR read enable valid mismatch\n", 763 __func__); 764 ctrl->intr_mask &= 765 ~SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH; 766 ctrl->reg_write(ctrl, 767 ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN], 768 ctrl->intr_mask); 769 break; 770 case SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED: 771 complete(&ctrl->broadcast); 772 break; 773 case SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED_V2: 774 break; 775 case SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED_V2: 776 break; 777 case SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP: 778 break; 779 case SWRM_INTERRUPT_STATUS_CMD_IGNORED_AND_EXEC_CONTINUED: 780 ctrl->reg_read(ctrl, 781 ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS], 782 &value); 783 dev_err(ctrl->dev, 784 "%s: SWR CMD ignored, fifo status %x\n", 785 __func__, value); 786 787 /* Wait 3.5ms to clear */ 788 usleep_range(3500, 3505); 789 break; 790 default: 791 dev_err_ratelimited(ctrl->dev, 792 "%s: SWR unknown interrupt value: %d\n", 793 __func__, value); 794 ret = IRQ_NONE; 795 break; 796 } 797 } 798 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CLEAR], 799 intr_sts); 800 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_STATUS], 801 &intr_sts); 802 intr_sts_masked = intr_sts & ctrl->intr_mask; 803 } while (intr_sts_masked); 804 805 clk_disable_unprepare(ctrl->hclk); 806 return ret; 807 } 808 809 static bool swrm_wait_for_frame_gen_enabled(struct qcom_swrm_ctrl *ctrl) 810 { 811 int retry = SWRM_LINK_STATUS_RETRY_CNT; 812 int comp_sts; 813 814 do { 815 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_FRAME_GEN_ENABLED], 816 &comp_sts); 817 if (comp_sts & SWRM_FRM_GEN_ENABLED) 818 return true; 819 820 usleep_range(500, 510); 821 } while (retry--); 822 823 dev_err(ctrl->dev, "%s: link status not %s\n", __func__, 824 comp_sts & SWRM_FRM_GEN_ENABLED ? "connected" : "disconnected"); 825 826 return false; 827 } 828 829 static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl) 830 { 831 u32 val; 832 833 /* Clear Rows and Cols */ 834 val = FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK, ctrl->rows_index); 835 val |= FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK, ctrl->cols_index); 836 837 reset_control_reset(ctrl->audio_cgcr); 838 839 ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val); 840 841 /* Enable Auto enumeration */ 842 ctrl->reg_write(ctrl, SWRM_ENUMERATOR_CFG_ADDR, 1); 843 844 ctrl->intr_mask = SWRM_INTERRUPT_STATUS_RMSK; 845 /* Mask soundwire interrupts */ 846 if (ctrl->version < SWRM_VERSION_2_0_0) 847 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_MASK_ADDR], 848 SWRM_INTERRUPT_STATUS_RMSK); 849 850 /* Configure No pings */ 851 ctrl->reg_read(ctrl, SWRM_MCP_CFG_ADDR, &val); 852 u32p_replace_bits(&val, SWRM_DEF_CMD_NO_PINGS, SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK); 853 ctrl->reg_write(ctrl, SWRM_MCP_CFG_ADDR, val); 854 855 if (ctrl->version == SWRM_VERSION_1_7_0) { 856 ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU); 857 ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, 858 SWRM_MCP_BUS_CLK_START << SWRM_EE_CPU); 859 } else if (ctrl->version >= SWRM_VERSION_2_0_0) { 860 ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU); 861 ctrl->reg_write(ctrl, SWRM_V2_0_CLK_CTRL, 862 SWRM_V2_0_CLK_CTRL_CLK_START); 863 } else { 864 ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START); 865 } 866 867 /* Configure number of retries of a read/write cmd */ 868 if (ctrl->version >= SWRM_VERSION_1_5_1) { 869 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CFG_ADDR, 870 SWRM_RD_WR_CMD_RETRIES | 871 SWRM_CONTINUE_EXEC_ON_CMD_IGNORE); 872 } else { 873 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CFG_ADDR, 874 SWRM_RD_WR_CMD_RETRIES); 875 } 876 877 /* COMP Enable */ 878 ctrl->reg_write(ctrl, SWRM_COMP_CFG_ADDR, SWRM_COMP_CFG_ENABLE_MSK); 879 880 /* Set IRQ to PULSE */ 881 ctrl->reg_write(ctrl, SWRM_COMP_CFG_ADDR, 882 SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK); 883 884 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CLEAR], 885 0xFFFFFFFF); 886 887 /* enable CPU IRQs */ 888 if (ctrl->mmio) { 889 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN], 890 SWRM_INTERRUPT_STATUS_RMSK); 891 } 892 893 /* Set IRQ to PULSE */ 894 ctrl->reg_write(ctrl, SWRM_COMP_CFG_ADDR, 895 SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK | 896 SWRM_COMP_CFG_ENABLE_MSK); 897 898 swrm_wait_for_frame_gen_enabled(ctrl); 899 ctrl->slave_status = 0; 900 ctrl->reg_read(ctrl, SWRM_COMP_PARAMS, &val); 901 ctrl->rd_fifo_depth = FIELD_GET(SWRM_COMP_PARAMS_RD_FIFO_DEPTH, val); 902 ctrl->wr_fifo_depth = FIELD_GET(SWRM_COMP_PARAMS_WR_FIFO_DEPTH, val); 903 904 return 0; 905 } 906 907 static int qcom_swrm_read_prop(struct sdw_bus *bus) 908 { 909 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 910 911 if (ctrl->version >= SWRM_VERSION_2_0_0) { 912 bus->multi_link = true; 913 bus->hw_sync_min_links = 3; 914 } 915 916 return 0; 917 } 918 919 static enum sdw_command_response qcom_swrm_xfer_msg(struct sdw_bus *bus, 920 struct sdw_msg *msg) 921 { 922 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 923 int ret, i, len; 924 925 if (msg->flags == SDW_MSG_FLAG_READ) { 926 for (i = 0; i < msg->len;) { 927 len = min(msg->len - i, QCOM_SWRM_MAX_RD_LEN); 928 929 ret = qcom_swrm_cmd_fifo_rd_cmd(ctrl, msg->dev_num, 930 msg->addr + i, len, 931 &msg->buf[i]); 932 if (ret) 933 return ret; 934 935 i = i + len; 936 } 937 } else if (msg->flags == SDW_MSG_FLAG_WRITE) { 938 for (i = 0; i < msg->len; i++) { 939 ret = qcom_swrm_cmd_fifo_wr_cmd(ctrl, msg->buf[i], 940 msg->dev_num, 941 msg->addr + i); 942 if (ret) 943 return SDW_CMD_IGNORED; 944 } 945 } 946 947 return SDW_CMD_OK; 948 } 949 950 static int qcom_swrm_pre_bank_switch(struct sdw_bus *bus) 951 { 952 u32 reg = SWRM_MCP_FRAME_CTRL_BANK_ADDR(bus->params.next_bank); 953 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 954 u32 val; 955 956 ctrl->reg_read(ctrl, reg, &val); 957 958 u32p_replace_bits(&val, ctrl->cols_index, SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK); 959 u32p_replace_bits(&val, ctrl->rows_index, SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK); 960 961 return ctrl->reg_write(ctrl, reg, val); 962 } 963 964 static int qcom_swrm_port_params(struct sdw_bus *bus, 965 struct sdw_port_params *p_params, 966 unsigned int bank) 967 { 968 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 969 970 return ctrl->reg_write(ctrl, SWRM_DP_BLOCK_CTRL_1(p_params->num), 971 p_params->bps - 1); 972 973 } 974 975 static int qcom_swrm_transport_params(struct sdw_bus *bus, 976 struct sdw_transport_params *params, 977 enum sdw_reg_bank bank) 978 { 979 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 980 struct qcom_swrm_port_config *pcfg; 981 u32 value; 982 int reg = SWRM_DP_PORT_CTRL_BANK((params->port_num), bank); 983 int ret; 984 985 pcfg = &ctrl->pconfig[params->port_num]; 986 987 value = pcfg->off1 << SWRM_DP_PORT_CTRL_OFFSET1_SHFT; 988 value |= pcfg->off2 << SWRM_DP_PORT_CTRL_OFFSET2_SHFT; 989 value |= pcfg->si & 0xff; 990 991 ret = ctrl->reg_write(ctrl, reg, value); 992 if (ret) 993 goto err; 994 995 if (pcfg->si > 0xff) { 996 value = (pcfg->si >> 8) & 0xff; 997 reg = SWRM_DP_SAMPLECTRL2_BANK(params->port_num, bank); 998 ret = ctrl->reg_write(ctrl, reg, value); 999 if (ret) 1000 goto err; 1001 } 1002 1003 if (pcfg->lane_control != SWR_INVALID_PARAM) { 1004 reg = SWRM_DP_PORT_CTRL_2_BANK(params->port_num, bank); 1005 value = pcfg->lane_control; 1006 ret = ctrl->reg_write(ctrl, reg, value); 1007 if (ret) 1008 goto err; 1009 } 1010 1011 if (pcfg->blk_group_count != SWR_INVALID_PARAM) { 1012 reg = SWRM_DP_BLOCK_CTRL2_BANK(params->port_num, bank); 1013 value = pcfg->blk_group_count; 1014 ret = ctrl->reg_write(ctrl, reg, value); 1015 if (ret) 1016 goto err; 1017 } 1018 1019 if (pcfg->hstart != SWR_INVALID_PARAM 1020 && pcfg->hstop != SWR_INVALID_PARAM) { 1021 reg = SWRM_DP_PORT_HCTRL_BANK(params->port_num, bank); 1022 value = (pcfg->hstop << 4) | pcfg->hstart; 1023 ret = ctrl->reg_write(ctrl, reg, value); 1024 } else { 1025 reg = SWRM_DP_PORT_HCTRL_BANK(params->port_num, bank); 1026 value = (SWR_HSTOP_MAX_VAL << 4) | SWR_HSTART_MIN_VAL; 1027 ret = ctrl->reg_write(ctrl, reg, value); 1028 } 1029 1030 if (ret) 1031 goto err; 1032 1033 if (pcfg->bp_mode != SWR_INVALID_PARAM) { 1034 reg = SWRM_DP_BLOCK_CTRL3_BANK(params->port_num, bank); 1035 ret = ctrl->reg_write(ctrl, reg, pcfg->bp_mode); 1036 } 1037 1038 err: 1039 return ret; 1040 } 1041 1042 static int qcom_swrm_port_enable(struct sdw_bus *bus, 1043 struct sdw_enable_ch *enable_ch, 1044 unsigned int bank) 1045 { 1046 u32 reg = SWRM_DP_PORT_CTRL_BANK(enable_ch->port_num, bank); 1047 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 1048 u32 val; 1049 1050 ctrl->reg_read(ctrl, reg, &val); 1051 1052 if (enable_ch->enable) 1053 val |= (enable_ch->ch_mask << SWRM_DP_PORT_CTRL_EN_CHAN_SHFT); 1054 else 1055 val &= ~(0xff << SWRM_DP_PORT_CTRL_EN_CHAN_SHFT); 1056 1057 return ctrl->reg_write(ctrl, reg, val); 1058 } 1059 1060 static const struct sdw_master_port_ops qcom_swrm_port_ops = { 1061 .dpn_set_port_params = qcom_swrm_port_params, 1062 .dpn_set_port_transport_params = qcom_swrm_transport_params, 1063 .dpn_port_enable_ch = qcom_swrm_port_enable, 1064 }; 1065 1066 static const struct sdw_master_ops qcom_swrm_ops = { 1067 .read_prop = qcom_swrm_read_prop, 1068 .xfer_msg = qcom_swrm_xfer_msg, 1069 .pre_bank_switch = qcom_swrm_pre_bank_switch, 1070 }; 1071 1072 static int qcom_swrm_compute_params(struct sdw_bus *bus, struct sdw_stream_runtime *stream) 1073 { 1074 struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus); 1075 struct sdw_master_runtime *m_rt; 1076 struct sdw_slave_runtime *s_rt; 1077 struct sdw_port_runtime *p_rt; 1078 struct qcom_swrm_port_config *pcfg; 1079 struct sdw_slave *slave; 1080 unsigned int m_port; 1081 int i = 1; 1082 1083 list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) { 1084 list_for_each_entry(p_rt, &m_rt->port_list, port_node) { 1085 pcfg = &ctrl->pconfig[p_rt->num]; 1086 p_rt->transport_params.port_num = p_rt->num; 1087 if (pcfg->word_length != SWR_INVALID_PARAM) { 1088 sdw_fill_port_params(&p_rt->port_params, 1089 p_rt->num, pcfg->word_length + 1, 1090 SDW_PORT_FLOW_MODE_ISOCH, 1091 SDW_PORT_DATA_MODE_NORMAL); 1092 } 1093 1094 } 1095 1096 list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { 1097 slave = s_rt->slave; 1098 list_for_each_entry(p_rt, &s_rt->port_list, port_node) { 1099 m_port = slave->m_port_map[p_rt->num]; 1100 /* port config starts at offset 0 so -1 from actual port number */ 1101 if (m_port) 1102 pcfg = &ctrl->pconfig[m_port]; 1103 else 1104 pcfg = &ctrl->pconfig[i]; 1105 p_rt->transport_params.port_num = p_rt->num; 1106 p_rt->transport_params.sample_interval = 1107 pcfg->si + 1; 1108 p_rt->transport_params.offset1 = pcfg->off1; 1109 p_rt->transport_params.offset2 = pcfg->off2; 1110 p_rt->transport_params.blk_pkg_mode = pcfg->bp_mode; 1111 p_rt->transport_params.blk_grp_ctrl = pcfg->blk_group_count; 1112 1113 p_rt->transport_params.hstart = pcfg->hstart; 1114 p_rt->transport_params.hstop = pcfg->hstop; 1115 p_rt->transport_params.lane_ctrl = pcfg->lane_control; 1116 if (pcfg->word_length != SWR_INVALID_PARAM) { 1117 sdw_fill_port_params(&p_rt->port_params, 1118 p_rt->num, 1119 pcfg->word_length + 1, 1120 SDW_PORT_FLOW_MODE_ISOCH, 1121 SDW_PORT_DATA_MODE_NORMAL); 1122 } 1123 i++; 1124 } 1125 } 1126 } 1127 1128 return 0; 1129 } 1130 1131 static u32 qcom_swrm_freq_tbl[MAX_FREQ_NUM] = { 1132 DEFAULT_CLK_FREQ, 1133 }; 1134 1135 static void qcom_swrm_stream_free_ports(struct qcom_swrm_ctrl *ctrl, 1136 struct sdw_stream_runtime *stream) 1137 { 1138 struct sdw_master_runtime *m_rt; 1139 struct sdw_port_runtime *p_rt; 1140 unsigned long *port_mask; 1141 1142 mutex_lock(&ctrl->port_lock); 1143 1144 list_for_each_entry(m_rt, &stream->master_list, stream_node) { 1145 port_mask = &ctrl->port_mask; 1146 list_for_each_entry(p_rt, &m_rt->port_list, port_node) 1147 clear_bit(p_rt->num, port_mask); 1148 } 1149 1150 mutex_unlock(&ctrl->port_lock); 1151 } 1152 1153 static int qcom_swrm_stream_alloc_ports(struct qcom_swrm_ctrl *ctrl, 1154 struct sdw_stream_runtime *stream, 1155 struct snd_pcm_hw_params *params, 1156 int direction) 1157 { 1158 struct sdw_port_config pconfig[QCOM_SDW_MAX_PORTS]; 1159 struct sdw_stream_config sconfig; 1160 struct sdw_master_runtime *m_rt; 1161 struct sdw_slave_runtime *s_rt; 1162 struct sdw_port_runtime *p_rt; 1163 struct sdw_slave *slave; 1164 unsigned long *port_mask; 1165 int maxport, pn, nports = 0, ret = 0; 1166 unsigned int m_port; 1167 1168 if (direction == SNDRV_PCM_STREAM_CAPTURE) 1169 sconfig.direction = SDW_DATA_DIR_TX; 1170 else 1171 sconfig.direction = SDW_DATA_DIR_RX; 1172 1173 /* hw parameters will be ignored as we only support PDM */ 1174 sconfig.ch_count = 1; 1175 sconfig.frame_rate = params_rate(params); 1176 sconfig.type = stream->type; 1177 sconfig.bps = 1; 1178 1179 mutex_lock(&ctrl->port_lock); 1180 list_for_each_entry(m_rt, &stream->master_list, stream_node) { 1181 /* 1182 * For streams with multiple masters: 1183 * Allocate ports only for devices connected to this master. 1184 * Such devices will have ports allocated by their own master 1185 * and its qcom_swrm_stream_alloc_ports() call. 1186 */ 1187 if (ctrl->bus.id != m_rt->bus->id) 1188 continue; 1189 1190 port_mask = &ctrl->port_mask; 1191 maxport = ctrl->num_dout_ports + ctrl->num_din_ports; 1192 1193 1194 list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { 1195 slave = s_rt->slave; 1196 list_for_each_entry(p_rt, &s_rt->port_list, port_node) { 1197 m_port = slave->m_port_map[p_rt->num]; 1198 /* Port numbers start from 1 - 14*/ 1199 if (m_port) 1200 pn = m_port; 1201 else 1202 pn = find_first_zero_bit(port_mask, maxport); 1203 1204 if (pn > maxport) { 1205 dev_err(ctrl->dev, "All ports busy\n"); 1206 ret = -EBUSY; 1207 goto out; 1208 } 1209 set_bit(pn, port_mask); 1210 pconfig[nports].num = pn; 1211 pconfig[nports].ch_mask = p_rt->ch_mask; 1212 nports++; 1213 } 1214 } 1215 } 1216 1217 sdw_stream_add_master(&ctrl->bus, &sconfig, pconfig, 1218 nports, stream); 1219 out: 1220 mutex_unlock(&ctrl->port_lock); 1221 1222 return ret; 1223 } 1224 1225 static int qcom_swrm_hw_params(struct snd_pcm_substream *substream, 1226 struct snd_pcm_hw_params *params, 1227 struct snd_soc_dai *dai) 1228 { 1229 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 1230 struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id]; 1231 int ret; 1232 1233 ret = qcom_swrm_stream_alloc_ports(ctrl, sruntime, params, 1234 substream->stream); 1235 if (ret) 1236 qcom_swrm_stream_free_ports(ctrl, sruntime); 1237 1238 return ret; 1239 } 1240 1241 static int qcom_swrm_hw_free(struct snd_pcm_substream *substream, 1242 struct snd_soc_dai *dai) 1243 { 1244 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 1245 struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id]; 1246 1247 qcom_swrm_stream_free_ports(ctrl, sruntime); 1248 sdw_stream_remove_master(&ctrl->bus, sruntime); 1249 1250 return 0; 1251 } 1252 1253 static int qcom_swrm_set_sdw_stream(struct snd_soc_dai *dai, 1254 void *stream, int direction) 1255 { 1256 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 1257 1258 ctrl->sruntime[dai->id] = stream; 1259 1260 return 0; 1261 } 1262 1263 static void *qcom_swrm_get_sdw_stream(struct snd_soc_dai *dai, int direction) 1264 { 1265 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 1266 1267 return ctrl->sruntime[dai->id]; 1268 } 1269 1270 static int qcom_swrm_startup(struct snd_pcm_substream *substream, 1271 struct snd_soc_dai *dai) 1272 { 1273 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 1274 int ret; 1275 1276 ret = pm_runtime_get_sync(ctrl->dev); 1277 if (ret < 0 && ret != -EACCES) { 1278 dev_err_ratelimited(ctrl->dev, 1279 "pm_runtime_get_sync failed in %s, ret %d\n", 1280 __func__, ret); 1281 pm_runtime_put_noidle(ctrl->dev); 1282 return ret; 1283 } 1284 1285 return 0; 1286 } 1287 1288 static void qcom_swrm_shutdown(struct snd_pcm_substream *substream, 1289 struct snd_soc_dai *dai) 1290 { 1291 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); 1292 1293 swrm_wait_for_wr_fifo_done(ctrl); 1294 pm_runtime_mark_last_busy(ctrl->dev); 1295 pm_runtime_put_autosuspend(ctrl->dev); 1296 1297 } 1298 1299 static const struct snd_soc_dai_ops qcom_swrm_pdm_dai_ops = { 1300 .hw_params = qcom_swrm_hw_params, 1301 .hw_free = qcom_swrm_hw_free, 1302 .startup = qcom_swrm_startup, 1303 .shutdown = qcom_swrm_shutdown, 1304 .set_stream = qcom_swrm_set_sdw_stream, 1305 .get_stream = qcom_swrm_get_sdw_stream, 1306 }; 1307 1308 static const struct snd_soc_component_driver qcom_swrm_dai_component = { 1309 .name = "soundwire", 1310 }; 1311 1312 static int qcom_swrm_register_dais(struct qcom_swrm_ctrl *ctrl) 1313 { 1314 int num_dais = ctrl->num_dout_ports + ctrl->num_din_ports; 1315 struct snd_soc_dai_driver *dais; 1316 struct snd_soc_pcm_stream *stream; 1317 struct device *dev = ctrl->dev; 1318 int i; 1319 1320 /* PDM dais are only tested for now */ 1321 dais = devm_kcalloc(dev, num_dais, sizeof(*dais), GFP_KERNEL); 1322 if (!dais) 1323 return -ENOMEM; 1324 1325 for (i = 0; i < num_dais; i++) { 1326 dais[i].name = devm_kasprintf(dev, GFP_KERNEL, "SDW Pin%d", i); 1327 if (!dais[i].name) 1328 return -ENOMEM; 1329 1330 if (i < ctrl->num_dout_ports) 1331 stream = &dais[i].playback; 1332 else 1333 stream = &dais[i].capture; 1334 1335 stream->channels_min = 1; 1336 stream->channels_max = 1; 1337 stream->rates = SNDRV_PCM_RATE_48000; 1338 stream->formats = SNDRV_PCM_FMTBIT_S16_LE; 1339 1340 dais[i].ops = &qcom_swrm_pdm_dai_ops; 1341 dais[i].id = i; 1342 } 1343 1344 return devm_snd_soc_register_component(ctrl->dev, 1345 &qcom_swrm_dai_component, 1346 dais, num_dais); 1347 } 1348 1349 static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl) 1350 { 1351 struct device_node *np = ctrl->dev->of_node; 1352 u8 off1[QCOM_SDW_MAX_PORTS]; 1353 u8 off2[QCOM_SDW_MAX_PORTS]; 1354 u16 si[QCOM_SDW_MAX_PORTS]; 1355 u8 bp_mode[QCOM_SDW_MAX_PORTS] = { 0, }; 1356 u8 hstart[QCOM_SDW_MAX_PORTS]; 1357 u8 hstop[QCOM_SDW_MAX_PORTS]; 1358 u8 word_length[QCOM_SDW_MAX_PORTS]; 1359 u8 blk_group_count[QCOM_SDW_MAX_PORTS]; 1360 u8 lane_control[QCOM_SDW_MAX_PORTS]; 1361 int i, ret, nports, val; 1362 bool si_16 = false; 1363 1364 ctrl->reg_read(ctrl, SWRM_COMP_PARAMS, &val); 1365 1366 ctrl->num_dout_ports = FIELD_GET(SWRM_COMP_PARAMS_DOUT_PORTS_MASK, val); 1367 ctrl->num_din_ports = FIELD_GET(SWRM_COMP_PARAMS_DIN_PORTS_MASK, val); 1368 1369 ret = of_property_read_u32(np, "qcom,din-ports", &val); 1370 if (ret) 1371 return ret; 1372 1373 if (val > ctrl->num_din_ports) 1374 return -EINVAL; 1375 1376 ctrl->num_din_ports = val; 1377 1378 ret = of_property_read_u32(np, "qcom,dout-ports", &val); 1379 if (ret) 1380 return ret; 1381 1382 if (val > ctrl->num_dout_ports) 1383 return -EINVAL; 1384 1385 ctrl->num_dout_ports = val; 1386 1387 nports = ctrl->num_dout_ports + ctrl->num_din_ports; 1388 if (nports > QCOM_SDW_MAX_PORTS) 1389 return -EINVAL; 1390 1391 /* Valid port numbers are from 1-14, so mask out port 0 explicitly */ 1392 set_bit(0, &ctrl->port_mask); 1393 1394 ret = of_property_read_u8_array(np, "qcom,ports-offset1", 1395 off1, nports); 1396 if (ret) 1397 return ret; 1398 1399 ret = of_property_read_u8_array(np, "qcom,ports-offset2", 1400 off2, nports); 1401 if (ret) 1402 return ret; 1403 1404 ret = of_property_read_u8_array(np, "qcom,ports-sinterval-low", 1405 (u8 *)si, nports); 1406 if (ret) { 1407 ret = of_property_read_u16_array(np, "qcom,ports-sinterval", 1408 si, nports); 1409 if (ret) 1410 return ret; 1411 si_16 = true; 1412 } 1413 1414 ret = of_property_read_u8_array(np, "qcom,ports-block-pack-mode", 1415 bp_mode, nports); 1416 if (ret) { 1417 if (ctrl->version <= SWRM_VERSION_1_3_0) 1418 memset(bp_mode, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1419 else 1420 return ret; 1421 } 1422 1423 memset(hstart, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1424 of_property_read_u8_array(np, "qcom,ports-hstart", hstart, nports); 1425 1426 memset(hstop, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1427 of_property_read_u8_array(np, "qcom,ports-hstop", hstop, nports); 1428 1429 memset(word_length, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1430 of_property_read_u8_array(np, "qcom,ports-word-length", word_length, nports); 1431 1432 memset(blk_group_count, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1433 of_property_read_u8_array(np, "qcom,ports-block-group-count", blk_group_count, nports); 1434 1435 memset(lane_control, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); 1436 of_property_read_u8_array(np, "qcom,ports-lane-control", lane_control, nports); 1437 1438 for (i = 0; i < nports; i++) { 1439 /* Valid port number range is from 1-14 */ 1440 if (si_16) 1441 ctrl->pconfig[i + 1].si = si[i]; 1442 else 1443 ctrl->pconfig[i + 1].si = ((u8 *)si)[i]; 1444 ctrl->pconfig[i + 1].off1 = off1[i]; 1445 ctrl->pconfig[i + 1].off2 = off2[i]; 1446 ctrl->pconfig[i + 1].bp_mode = bp_mode[i]; 1447 ctrl->pconfig[i + 1].hstart = hstart[i]; 1448 ctrl->pconfig[i + 1].hstop = hstop[i]; 1449 ctrl->pconfig[i + 1].word_length = word_length[i]; 1450 ctrl->pconfig[i + 1].blk_group_count = blk_group_count[i]; 1451 ctrl->pconfig[i + 1].lane_control = lane_control[i]; 1452 } 1453 1454 return 0; 1455 } 1456 1457 #ifdef CONFIG_DEBUG_FS 1458 static int swrm_reg_show(struct seq_file *s_file, void *data) 1459 { 1460 struct qcom_swrm_ctrl *ctrl = s_file->private; 1461 int reg, reg_val, ret; 1462 1463 ret = pm_runtime_get_sync(ctrl->dev); 1464 if (ret < 0 && ret != -EACCES) { 1465 dev_err_ratelimited(ctrl->dev, 1466 "pm_runtime_get_sync failed in %s, ret %d\n", 1467 __func__, ret); 1468 pm_runtime_put_noidle(ctrl->dev); 1469 return ret; 1470 } 1471 1472 for (reg = 0; reg <= ctrl->max_reg; reg += 4) { 1473 ctrl->reg_read(ctrl, reg, ®_val); 1474 seq_printf(s_file, "0x%.3x: 0x%.2x\n", reg, reg_val); 1475 } 1476 pm_runtime_mark_last_busy(ctrl->dev); 1477 pm_runtime_put_autosuspend(ctrl->dev); 1478 1479 1480 return 0; 1481 } 1482 DEFINE_SHOW_ATTRIBUTE(swrm_reg); 1483 #endif 1484 1485 static int qcom_swrm_probe(struct platform_device *pdev) 1486 { 1487 struct device *dev = &pdev->dev; 1488 struct sdw_master_prop *prop; 1489 struct sdw_bus_params *params; 1490 struct qcom_swrm_ctrl *ctrl; 1491 const struct qcom_swrm_data *data; 1492 int ret; 1493 u32 val; 1494 1495 ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); 1496 if (!ctrl) 1497 return -ENOMEM; 1498 1499 data = of_device_get_match_data(dev); 1500 ctrl->max_reg = data->max_reg; 1501 ctrl->reg_layout = data->reg_layout; 1502 ctrl->rows_index = sdw_find_row_index(data->default_rows); 1503 ctrl->cols_index = sdw_find_col_index(data->default_cols); 1504 #if IS_REACHABLE(CONFIG_SLIMBUS) 1505 if (dev->parent->bus == &slimbus_bus) { 1506 #else 1507 if (false) { 1508 #endif 1509 ctrl->reg_read = qcom_swrm_ahb_reg_read; 1510 ctrl->reg_write = qcom_swrm_ahb_reg_write; 1511 ctrl->regmap = dev_get_regmap(dev->parent, NULL); 1512 if (!ctrl->regmap) 1513 return -EINVAL; 1514 } else { 1515 ctrl->reg_read = qcom_swrm_cpu_reg_read; 1516 ctrl->reg_write = qcom_swrm_cpu_reg_write; 1517 ctrl->mmio = devm_platform_ioremap_resource(pdev, 0); 1518 if (IS_ERR(ctrl->mmio)) 1519 return PTR_ERR(ctrl->mmio); 1520 } 1521 1522 if (data->sw_clk_gate_required) { 1523 ctrl->audio_cgcr = devm_reset_control_get_optional_exclusive(dev, "swr_audio_cgcr"); 1524 if (IS_ERR(ctrl->audio_cgcr)) { 1525 dev_err(dev, "Failed to get cgcr reset ctrl required for SW gating\n"); 1526 ret = PTR_ERR(ctrl->audio_cgcr); 1527 goto err_init; 1528 } 1529 } 1530 1531 ctrl->irq = of_irq_get(dev->of_node, 0); 1532 if (ctrl->irq < 0) { 1533 ret = ctrl->irq; 1534 goto err_init; 1535 } 1536 1537 ctrl->hclk = devm_clk_get(dev, "iface"); 1538 if (IS_ERR(ctrl->hclk)) { 1539 ret = dev_err_probe(dev, PTR_ERR(ctrl->hclk), "unable to get iface clock\n"); 1540 goto err_init; 1541 } 1542 1543 clk_prepare_enable(ctrl->hclk); 1544 1545 ctrl->dev = dev; 1546 dev_set_drvdata(&pdev->dev, ctrl); 1547 mutex_init(&ctrl->port_lock); 1548 init_completion(&ctrl->broadcast); 1549 init_completion(&ctrl->enumeration); 1550 1551 ctrl->bus.ops = &qcom_swrm_ops; 1552 ctrl->bus.port_ops = &qcom_swrm_port_ops; 1553 ctrl->bus.compute_params = &qcom_swrm_compute_params; 1554 ctrl->bus.clk_stop_timeout = 300; 1555 1556 ret = qcom_swrm_get_port_config(ctrl); 1557 if (ret) 1558 goto err_clk; 1559 1560 params = &ctrl->bus.params; 1561 params->max_dr_freq = DEFAULT_CLK_FREQ; 1562 params->curr_dr_freq = DEFAULT_CLK_FREQ; 1563 params->col = data->default_cols; 1564 params->row = data->default_rows; 1565 ctrl->reg_read(ctrl, SWRM_MCP_STATUS, &val); 1566 params->curr_bank = val & SWRM_MCP_STATUS_BANK_NUM_MASK; 1567 params->next_bank = !params->curr_bank; 1568 1569 prop = &ctrl->bus.prop; 1570 prop->max_clk_freq = DEFAULT_CLK_FREQ; 1571 prop->num_clk_gears = 0; 1572 prop->num_clk_freq = MAX_FREQ_NUM; 1573 prop->clk_freq = &qcom_swrm_freq_tbl[0]; 1574 prop->default_col = data->default_cols; 1575 prop->default_row = data->default_rows; 1576 1577 ctrl->reg_read(ctrl, SWRM_COMP_HW_VERSION, &ctrl->version); 1578 1579 ret = devm_request_threaded_irq(dev, ctrl->irq, NULL, 1580 qcom_swrm_irq_handler, 1581 IRQF_TRIGGER_RISING | 1582 IRQF_ONESHOT, 1583 "soundwire", ctrl); 1584 if (ret) { 1585 dev_err(dev, "Failed to request soundwire irq\n"); 1586 goto err_clk; 1587 } 1588 1589 ctrl->wake_irq = of_irq_get(dev->of_node, 1); 1590 if (ctrl->wake_irq > 0) { 1591 ret = devm_request_threaded_irq(dev, ctrl->wake_irq, NULL, 1592 qcom_swrm_wake_irq_handler, 1593 IRQF_TRIGGER_HIGH | IRQF_ONESHOT, 1594 "swr_wake_irq", ctrl); 1595 if (ret) { 1596 dev_err(dev, "Failed to request soundwire wake irq\n"); 1597 goto err_init; 1598 } 1599 } 1600 1601 ctrl->bus.controller_id = -1; 1602 1603 if (ctrl->version > SWRM_VERSION_1_3_0) { 1604 ctrl->reg_read(ctrl, SWRM_COMP_MASTER_ID, &val); 1605 ctrl->bus.controller_id = val; 1606 } 1607 1608 ret = sdw_bus_master_add(&ctrl->bus, dev, dev->fwnode); 1609 if (ret) { 1610 dev_err(dev, "Failed to register Soundwire controller (%d)\n", 1611 ret); 1612 goto err_clk; 1613 } 1614 1615 qcom_swrm_init(ctrl); 1616 wait_for_completion_timeout(&ctrl->enumeration, 1617 msecs_to_jiffies(TIMEOUT_MS)); 1618 ret = qcom_swrm_register_dais(ctrl); 1619 if (ret) 1620 goto err_master_add; 1621 1622 dev_dbg(dev, "Qualcomm Soundwire controller v%x.%x.%x registered\n", 1623 (ctrl->version >> 24) & 0xff, (ctrl->version >> 16) & 0xff, 1624 ctrl->version & 0xffff); 1625 1626 pm_runtime_set_autosuspend_delay(dev, 3000); 1627 pm_runtime_use_autosuspend(dev); 1628 pm_runtime_mark_last_busy(dev); 1629 pm_runtime_set_active(dev); 1630 pm_runtime_enable(dev); 1631 1632 #ifdef CONFIG_DEBUG_FS 1633 ctrl->debugfs = debugfs_create_dir("qualcomm-sdw", ctrl->bus.debugfs); 1634 debugfs_create_file("qualcomm-registers", 0400, ctrl->debugfs, ctrl, 1635 &swrm_reg_fops); 1636 #endif 1637 1638 return 0; 1639 1640 err_master_add: 1641 sdw_bus_master_delete(&ctrl->bus); 1642 err_clk: 1643 clk_disable_unprepare(ctrl->hclk); 1644 err_init: 1645 return ret; 1646 } 1647 1648 static void qcom_swrm_remove(struct platform_device *pdev) 1649 { 1650 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(&pdev->dev); 1651 1652 sdw_bus_master_delete(&ctrl->bus); 1653 clk_disable_unprepare(ctrl->hclk); 1654 } 1655 1656 static int __maybe_unused swrm_runtime_resume(struct device *dev) 1657 { 1658 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dev); 1659 int ret; 1660 1661 if (ctrl->wake_irq > 0) { 1662 if (!irqd_irq_disabled(irq_get_irq_data(ctrl->wake_irq))) 1663 disable_irq_nosync(ctrl->wake_irq); 1664 } 1665 1666 clk_prepare_enable(ctrl->hclk); 1667 1668 if (ctrl->clock_stop_not_supported) { 1669 reinit_completion(&ctrl->enumeration); 1670 ctrl->reg_write(ctrl, SWRM_COMP_SW_RESET, 0x01); 1671 usleep_range(100, 105); 1672 1673 qcom_swrm_init(ctrl); 1674 1675 usleep_range(100, 105); 1676 if (!swrm_wait_for_frame_gen_enabled(ctrl)) 1677 dev_err(ctrl->dev, "link failed to connect\n"); 1678 1679 /* wait for hw enumeration to complete */ 1680 wait_for_completion_timeout(&ctrl->enumeration, 1681 msecs_to_jiffies(TIMEOUT_MS)); 1682 qcom_swrm_get_device_status(ctrl); 1683 sdw_handle_slave_status(&ctrl->bus, ctrl->status); 1684 } else { 1685 reset_control_reset(ctrl->audio_cgcr); 1686 1687 if (ctrl->version == SWRM_VERSION_1_7_0) { 1688 ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU); 1689 ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, 1690 SWRM_MCP_BUS_CLK_START << SWRM_EE_CPU); 1691 } else if (ctrl->version >= SWRM_VERSION_2_0_0) { 1692 ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU); 1693 ctrl->reg_write(ctrl, SWRM_V2_0_CLK_CTRL, 1694 SWRM_V2_0_CLK_CTRL_CLK_START); 1695 } else { 1696 ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START); 1697 } 1698 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CLEAR], 1699 SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET); 1700 1701 ctrl->intr_mask |= SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET; 1702 if (ctrl->version < SWRM_VERSION_2_0_0) 1703 ctrl->reg_write(ctrl, 1704 ctrl->reg_layout[SWRM_REG_INTERRUPT_MASK_ADDR], 1705 ctrl->intr_mask); 1706 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN], 1707 ctrl->intr_mask); 1708 1709 usleep_range(100, 105); 1710 if (!swrm_wait_for_frame_gen_enabled(ctrl)) 1711 dev_err(ctrl->dev, "link failed to connect\n"); 1712 1713 ret = sdw_bus_exit_clk_stop(&ctrl->bus); 1714 if (ret < 0) 1715 dev_err(ctrl->dev, "bus failed to exit clock stop %d\n", ret); 1716 } 1717 1718 return 0; 1719 } 1720 1721 static int __maybe_unused swrm_runtime_suspend(struct device *dev) 1722 { 1723 struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dev); 1724 int ret; 1725 1726 swrm_wait_for_wr_fifo_done(ctrl); 1727 if (!ctrl->clock_stop_not_supported) { 1728 /* Mask bus clash interrupt */ 1729 ctrl->intr_mask &= ~SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET; 1730 if (ctrl->version < SWRM_VERSION_2_0_0) 1731 ctrl->reg_write(ctrl, 1732 ctrl->reg_layout[SWRM_REG_INTERRUPT_MASK_ADDR], 1733 ctrl->intr_mask); 1734 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN], 1735 ctrl->intr_mask); 1736 /* Prepare slaves for clock stop */ 1737 ret = sdw_bus_prep_clk_stop(&ctrl->bus); 1738 if (ret < 0 && ret != -ENODATA) { 1739 dev_err(dev, "prepare clock stop failed %d", ret); 1740 return ret; 1741 } 1742 1743 ret = sdw_bus_clk_stop(&ctrl->bus); 1744 if (ret < 0 && ret != -ENODATA) { 1745 dev_err(dev, "bus clock stop failed %d", ret); 1746 return ret; 1747 } 1748 } 1749 1750 clk_disable_unprepare(ctrl->hclk); 1751 1752 usleep_range(300, 305); 1753 1754 if (ctrl->wake_irq > 0) { 1755 if (irqd_irq_disabled(irq_get_irq_data(ctrl->wake_irq))) 1756 enable_irq(ctrl->wake_irq); 1757 } 1758 1759 return 0; 1760 } 1761 1762 static const struct dev_pm_ops swrm_dev_pm_ops = { 1763 SET_RUNTIME_PM_OPS(swrm_runtime_suspend, swrm_runtime_resume, NULL) 1764 }; 1765 1766 static const struct of_device_id qcom_swrm_of_match[] = { 1767 { .compatible = "qcom,soundwire-v1.3.0", .data = &swrm_v1_3_data }, 1768 { .compatible = "qcom,soundwire-v1.5.1", .data = &swrm_v1_5_data }, 1769 { .compatible = "qcom,soundwire-v1.6.0", .data = &swrm_v1_6_data }, 1770 { .compatible = "qcom,soundwire-v1.7.0", .data = &swrm_v1_5_data }, 1771 { .compatible = "qcom,soundwire-v2.0.0", .data = &swrm_v2_0_data }, 1772 {/* sentinel */}, 1773 }; 1774 1775 MODULE_DEVICE_TABLE(of, qcom_swrm_of_match); 1776 1777 static struct platform_driver qcom_swrm_driver = { 1778 .probe = &qcom_swrm_probe, 1779 .remove = qcom_swrm_remove, 1780 .driver = { 1781 .name = "qcom-soundwire", 1782 .of_match_table = qcom_swrm_of_match, 1783 .pm = &swrm_dev_pm_ops, 1784 } 1785 }; 1786 module_platform_driver(qcom_swrm_driver); 1787 1788 MODULE_DESCRIPTION("Qualcomm soundwire driver"); 1789 MODULE_LICENSE("GPL v2"); 1790